China denounced as protectionist new U.S. anti-dumping duties and vowed to protect the interests of its industry a week before President Barack Obama heads for talks in Beijing and Shanghai.

The United States has set preliminary anti-dumping duties ranging from 36.53 percent to 99.14 percent on Chinese-made steel pipe used in wells to extract oil from the earth, a source familiar with the situation said on Thursday.

The United States said on Tuesday it set preliminary duties ranging from 2 percent to 438 percent on hundreds of millions of dollars of imported steel wire decking from China to offset government subsidies.

Stocks tumbled Friday, giving back all of the gains from the prior session, as worries about the recovery escalated after a pair of reports on the consumer and as the dollar rallied. The Dow shed 250 points, or 2.5 percent, but finished flat for the month.

Stocks tumbled Friday, giving back all of the gains from the prior session, as worries about the recovery escalated after a pair of reports on the consumer.

Stocks opened lower Friday after reports showed consumer sentiment and spending have declined.

Futures indicated a lower open for Wall Street on Friday, the last trading day of October, after the Dow experienced its best day in 3 months Thursday after GDP data showed the world's biggest economy exited recession in the third quarter.

Stocks rallied Thursday, rebounding off of the prior session's rout, after reports showed the economy grew more than expected last quarter and jobless claims fell. The Dow jumped more than 2 percent—its best day since July.

Stocks rallied Thursday, rebounding off of the prior session's rout, after reports showed the economy grew more than expected last quarter and jobless claims fell.

Stocks rallied Thursday, rebounding off of the prior session's rout, after reports showed the economy grew more than expected last quarter and jobless claims fell.

Futures pointed to a positive open for Wall Street on Thursday ahead of the all-important U.S. third-quarter gross domestic product data.

China has told the United States it is launching a trade investigation that could lead to new import duties on autos and sports utility vehicles made by Chrysler, Ford and General Motors.

Stocks tumbled to session lows late Wednesday, with the Dow down more than 100 points, as worries about the recovery gripped the market.

Stocks were lower at the halfway point Wednesday as investors shrugged off some good news and worries about the recovery gripped the market.

Stocksskidded Wednesday, despite a rise in durable-goods orders and some earnings beats, as worries about the recovery dragged on the market.